Dinosaurs That Walked the Earth

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Dinosaurs That Walked the Earth

• Miss Craigs Second Grade Science PowerPoint

Contents
Introduction
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• 65 million years ago dinosaurs once walked the
  earth. They lived for 165 million years. Humans
  have only been here for 2 million. There were
  many different types of dinosaurs. One of the
  main ways to identify a dinosaur is what it ate.
  The way a dinosaur looked was important for
  getting its food. Scientists study all this and
  more for us to learn about the creatures that
  roamed so long ago.

Timeline
Sizes
Contents
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Contents
Home Herbivores What happened Introduction Bra
chiosaurus How do we know Timeline Stegosaurus
Credits Size Omnivores Carnivores
Ornithomimus T-Rex Oviraptors Uthasaurus
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Dinosaurs first roamed the earth
Dinosaurs died out
Humans walked the Earth
Over 200 Million Years ago
Over 200 Million Years ago
65 Million Years ago
2 Million Years ago
Introduction
Contents
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25 Feet tall
75 Feet tall
6 Feet tall
Introduction
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Carnivores

• Being a Carnivore means being a meat-eater. These
  dinosaurs had to hunt to catch their meat. To
  help them hunt they needed long strong legs to
  outrun their prey. They also needed big strong
  jaws, razor sharp teeth and claws to tear them
  apart. Having good eye-sight and sense of smell
  with a large brain to plan hunting strategies
  also helped to catch their prey. Two examples of
  meat eating dinosaurs are the T-Rex and
  Utahraptor.

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Tyrannosaurus Rex
Carnivores
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Utahraptor
Carnivores
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Herbivores

• Being a herbivore means being a plant-eater.
  Herbivores used there blunt teeth to pull the
  leaves off of plants. Their flat teeth would help
  them to grind the food down. Many herbivores had
  pouches in their cheeks to store food. Two
  examples of plant eating dinosaurs are the
  Brachiosaurus and the Stegosaurus.

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Brachiosaurus
Herbivores
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Stegosaurus
Herbivores
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Omnivores

• Omnivores means to eat both meat and plants. They
  would also eat eggs of other dinosaurs. These
  dinosaurs would also have both sharp and blunt
  teeth. They had sharp claws and were very fast.
  Two examples of Omnivores are the Ornithomimus
  and the Oviraptor.

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Ornithomimus

• This omnivore lived 76-65 million years ago. It
  was 15-20 feet long head to tail and 6-8 feet
  tall. Standing on its two long legs, it was able
  to run up to 43 miles and hour. This dinosaur
  also had a large sized brain. Its diet consist of
  insects, small reptiles and mammals, eggs, fruit
  and leaves.

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Omnivores
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Oviraptor

• This omnivore lived 88-70 million years ago. It
  was 6 to 8 feet long, it only weighed 55-76
  pounds. It stood on two long legs, making it able
  to run 43 miles an hour. It had curved claws on
  its three-fingered hands and three-toed feet. The
  claws on its large hands were 3 inches long. It
  had a short beak without teeth. Its jaws were
  very strong to crush things. It had a large
  brain. Its diet consisted of meat, eggs, seeds,
  insects, and plants. It was thought to eat mostly
  eggs.

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Omnivores
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What happened to the Dinosaurs?

• Scientist believe that a giant meteor hit the
  Earth, this caused acid rain which poisoned the
  water and made clouds of dust to hide the sun.
  This made winter which lasted for 10 years,
  leaving everything to die out. Some scientist
  also believe the dinosaurs died out do to
  volcanoes erupting.

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How do we know?
Timeline
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How do we know

• Scientists called paleontologists are the ones
  who study and discover about dinosaurs. They find
  and dig fossils from the ground. A fossil is
  defined as any trace of a past life form. Wood,
  bones, shells and tracks all are fossils. Fossils
  that paleontologists study can be thousands to
  billions years old. They use many different
  tools hammer, chisels, knifes, and paint
  brushes. They even sometimes need dynamite or
  jackhammers. Paleontologists use all these tools
  to bring fossils up from dirt and study them. To
  study their fossils they use a hand lens and
  notebook to record their findings. They also need
  to be safe while working outside so they wear
  hard hats, eye protection and steel-tipped shoes.
  Since they are outside for a long time they need
  to pack water, food, first aid kit, maps, and
  sunscreen. Paleontologists need a lot of time and
  a team to help them bring up fragile dinosaur
  bones, to take them to a lab for further study
  and so we can view them in the museums.

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What happened?
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Credits

• Special thanks to
• For Research
• Dinosaurs-Herbivores
• http//www.wa.gov.av/tiac/forum/99entries/luketin
  /herbivores.html
• Dinosaurs-Carnivores
• http//www.wa.gov.av/tiac/forum/99entries/luketin
  /carnivore.html
• Dinosaurs-Diets
• http//www.enchantedlearning.com/subjects/dinosau
  rs/anatomy.Diet.shtml
• Orme, David and Helen Bird. Dinosaur World,
  Dutton Childrens Book. New York
• Wood, Robert Muir. How it Works, Discovering
  Prehistory, Barnes and Noble Books. New York
• For Sound
• Wave Sound
• Amazon.com/Dinosaur sounds

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